Random access channel transmission for frame based equipment (FBE) mode

Abstract

A method of wireless communication performed by a user equipment (UE), the method comprising: receiving, from a base station (BS), a random access configuration for a plurality of frame based equipment (FBE) frames, each FBE frame of the plurality of FBE frames including a transmission period and an idle period; and determining a plurality of ROs based on the random access configuration, wherein at least one RO of the plurality of ROs is at least partially overlapping with the idle period of at least one FBE frame of the plurality of FBE frames.

What is claimed is: 
     
       1. A method of wireless communication performed by a first wireless communication device, the method comprising:
 communicating, with a second wireless communication device, a random access configuration for a plurality of frame based equipment (FBE) frames, each FBE frame of the plurality of FBE frames including a transmission period and an idle period; and 
 determining a plurality of random access occasions based on the random access configuration, wherein at least one random access occasion of the plurality of random access occasions is at least partially overlapping with the idle period of at least one of the plurality of FBE frames. 
 
     
     
       2. The method of  claim 1 , wherein the determining comprises:
 determining a first group of random access occasions from the plurality of random access occasions, wherein each random access occasion in the first group is within the transmission period of one of the plurality of FBE frames; and 
 determining a second group of random access occasions from the plurality of random access occasions, wherein each random access occasion in the second group is at least partially overlapping with the idle period of at least one of the plurality of FBE frames; and 
 wherein the method further comprises:
 performing a synchronization signal block (SSB)-to-random access occasion mapping procedure, wherein the performing the SSB-to-random access occasion mapping procedure comprises:
 mapping a set of synchronization signal blocks (SSBs) to the random access occasions in the first group based on a mapping order; and 
 mapping the set of SSBs to the random access occasions in the second group based on the mapping order. 
 
 
 
     
     
       3. The method of  claim 2 , wherein the performing the SSB-to-random access occasion mapping procedure further comprises:
 mapping the set of SSBs to the random access occasions in the first group based on a common association period; 
 mapping the set of SSBs to the random access occasions in the second group based on the common association period; and 
 determining the common association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods. 
 
     
     
       4. The method of  claim 2 , wherein the performing the SSB-to-random access occasion mapping procedure further comprises:
 mapping the set of SSBs to the random access occasions in the first group based on a common association period; 
 mapping the set of SSBs to the random access occasions in the second group based on the common association period; 
 determining a first association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 determining a second association period based on at least one of a number of random access occasions of the second group in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 determining the common association period based on a maximum period between the first association period and the second association period. 
 
     
     
       5. The method of  claim 2 , wherein the performing the SSB-to-random access occasion mapping procedure further comprises:
 determining a first association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 mapping the set of SSBs to the random access occasions in the first group based on the first association period; 
 determining a second association period based on at least one of a number of random access occasions of the second group in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 mapping the set of SSBs to the random access occasions in the second group based on the second association period. 
 
     
     
       6. The method of  claim 1 , wherein:
 the communicating the random access configuration comprises:
 communicating, with the second wireless communication device, a first random access configuration indicating a first set of random access occasions in the plurality of FBE frames; and 
 communicating, with the second wireless communication device, a second random access configuration indicating a second set of random access occasions in the plurality of FBE frames; and 
 
 the determining comprises:
 determining, based on the first random access configuration, a first subset of the plurality of random access occasions by excluding any random access occasion in the first set of random access occasions that is not fully within the transmission period of the plurality of FBE frames; and 
 determining, based on the second random access configuration, a second subset of the plurality of random access occasions by excluding any random access occasion in the second set of random access occasions that is fully within the transmission period of the plurality of FBE frames. 
 
 
     
     
       7. The method of  claim 1 , wherein:
 the communicating the random access configuration comprises:
 communicating, with the second wireless communication device, a first random access configuration indicating a first set of random access occasions in the plurality of FBE frames; and 
 communicating, with the second wireless communication device, a second random access configuration indicating a second set of random access occasions in the plurality of FBE frames, wherein each random access occasion of the second set of random access occasions is at least partially overlapping with the idle period of the plurality of FBE frames; and 
 
 the determining comprises:
 determining, based on the first random access configuration, a first subset of the plurality of random access occasions by excluding any random access occasion in the first set of random access occasions that is not fully within the transmission period of the plurality of FBE frames; and 
 determining, based on the second random access configuration, a second subset of the plurality of random access occasions by including all of the second set of random access occasions. 
 
 
     
     
       8. The method of  claim 7 , wherein the second random access configuration indicates at least one of a set of subframes for the second set of random access occasions, a random access slot within a random access subframe for the second set of random access occasions, a starting symbol for the second set of random access occasions, or a number of random access occasions in the random access slot,
 wherein the set of subframes include the idle period of a first FBE frame of the plurality of FBE frames, 
 wherein the second random access configuration indicates the random access slot within the random access subframe, and wherein the random access slot is a last slot within the random access subframe, and 
 wherein the second random access configuration indicates the starting symbol, and wherein the starting symbol is one of:
 within a first FBE frame of the plurality of FBE frames and outside of the idle period of the first FBE frame; 
 within the idle period of a first FBE frame of the plurality of FBE frames; or 
 within the idle period of a first FBE frame of the plurality of FBE frames and offset from an earliest symbol of the idle period of the first FBE frame. 
 
 
     
     
       9. The method of  claim 7 , wherein the second random access configuration indicates at least one of a set of subframes for the second set of random access occasions, a random access slot within a random access subframe for the second set of random access occasions, a starting symbol for the second set of random access occasions, or a number of random access occasions in the random access slot,
 wherein the set of subframes include the idle period of a first FBE frame of the plurality of FBE frames, 
 wherein the second random access configuration indicates the random access slot within the random access subframe, and wherein the random access slot is a last slot within the random access subframe, 
 wherein the second random access configuration further indicates the number of random access occasions, and 
 wherein a latest random access occasion of the second set of random access occasions is fully within the idle period of a first FBE frame of the plurality of FBE frames and offset from a last symbol of the idle period of the first FBE frame. 
 
     
     
       10. The method of any of  claim 6 or 7 , further comprising:
 performing a synchronization signal block (SSB)-to-random access occasion mapping procedure, wherein the performing the SSB-to-random access occasion mapping procedure comprises:
 mapping a set of synchronization signal blocks (SSBs) to the first subset of the plurality of random access occasions based on a mapping order; 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the mapping order; 
 mapping the set of SSBs to the first subset of the plurality of random access occasions based on a common association period; and 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the common association period. 
 
 
     
     
       11. The method of  claim 10 , wherein the performing the SSB-to-random access occasion mapping procedure further comprises:
 determining the common association period based on at least one of a number of random access occasions of the first subset of the plurality of random access occasions in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods. 
 
     
     
       12. The method of  claim 10 , wherein the performing the SSB-to-random access occasion mapping procedure further comprises:
 determining a first association period based on at least one of a number of random access occasions of the first subset of the plurality of random access occasions in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 determining a second association period based on at least one of a number of random access occasions of the second subset of the plurality of random access occasions in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 determining the common association period based on a maximum period between the first association period and the second association period. 
 
     
     
       13. The method of any of  claim 6 or 7 , further comprising:
 performing a synchronization signal block (SSB)-to-random access occasion mapping procedure, wherein the performing the SSB-to-random access occasion mapping procedure comprises:
 mapping a set of synchronization signal blocks (SSBs) to the first subset of the plurality of random access occasions based on a mapping order; 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the mapping order; 
 determining a first association period based on at least one of a number of random access occasions of the first subset of the plurality of random access occasions in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 mapping the set of SSBs to the first subset of the plurality of random access occasions based on the first association period; 
 determining a second association period based on at least one of a number of random access occasions of the second subset of the plurality of random access occasions in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the second association period. 
 
 
     
     
       14. A wireless communication device, the comprising:
 a transceiver configured to:
 communicate, with a second wireless communication device, a random access configuration for a plurality of frame based equipment (FBE) frames, each FBE frame of the plurality of FBE frames including a transmission period and an idle period; and 
 
 a processor in communication with the transceiver, the processor configured to:
 determine a plurality of random access occasions based on the random access configuration, wherein at least one random access occasion of the plurality of random access occasions is at least partially overlapping with the idle period of at least one of the plurality of FBE frames. 
 
 
     
     
       15. The wireless communication device of  claim 14 , wherein the processor is further configured to:
 determine a first group of random access occasions from the plurality of random access occasions, wherein each random access occasion in the first group is within the transmission period of one of the plurality of FBE frames; and 
 determine a second group of random access occasions from the plurality of random access occasions, wherein each random access occasion in the second group is at least partially overlapping with the idle period of at least one of the plurality of FBE frames; and 
 perform a synchronization signal block (SSB)-to-random access occasion mapping procedure, wherein the SSB-to-random access occasion mapping procedure comprises:
 mapping a set of synchronization signal blocks (SSBs) to the random access occasions in the first group based on a mapping order; and 
 mapping the set of SSBs to the random access occasions in the second group based on the mapping order. 
 
 
     
     
       16. The wireless communication device of  claim 15 , wherein the processor is further configured to perform the SSB-to-random access occasion mapping procedure by:
 map the set of SSBs to the random access occasions in the first group based on a common association period; 
 map the set of SSBs to the random access occasions in the second group based on the common association period; and 
 determine the common association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods. 
 
     
     
       17. The wireless communication device of  claim 15 , wherein the processor is further configured to:
 map the set of SSBs to the random access occasions in the first group based on a common association period; 
 map the set of SSBs to the random access occasions in the second group based on the common association period; 
 determine a first association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 determine a second association period based on at least one of a number of random access occasions of the second group in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 determine the common association period based on a maximum period between the first association period and the second association period. 
 
     
     
       18. The wireless communication device of  claim 15 , wherein the processor is further configured to:
 determine a first association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 map the set of SSBs to the random access occasions in the first group based on the first association period; 
 determine a second association period based on at least one of a number of random access occasions of the second group in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 map the set of SSBs to the random access occasions in the second group based on the second association period; 
 mapping the set of SSBs to the random access occasions in the second group based on the second association period. 
 
     
     
       19. The wireless communication device of  claim 14 , wherein:
 the transceiver is further configured to communicate the random access configuration by:
 communicating, with the second wireless communication device, a first random access configuration indicating a first set of random access occasions in the plurality of FBE frames; and 
 communicating, with the second wireless communication device, a second random access configuration indicating a second set of random access occasions in the plurality of FBE frames; and 
 
 the processor is further configured to determine the plurality of random access occasions by:
 determining, based on the first random access configuration, a first subset of the plurality of random access occasions by excluding any random access occasion in the first set of random access occasions that is not fully within the transmission period of the plurality of FBE frames; and 
 determining, based on the second random access configuration, a second subset of the plurality of random access occasions by excluding any random access occasion in the second set of random access occasions that is fully within the transmission period of the plurality of FBE frames. 
 
 
     
     
       20. The wireless communication device of  claim 14 , wherein:
 the transceiver is further configured to communicate the random access configuration by:
 communicating, with the second wireless communication device, a first random access configuration indicating a first set of random access occasions in the plurality of FBE frames; and 
 communicating, with the second wireless communication device, a second random access configuration indicating a second set of random access occasions in the plurality of FBE frames, wherein each random access occasion of the second set of random access occasions is at least partially overlapping with the idle period of the plurality of FBE frames; and 
 
 the processor is further configured to determine the plurality of random access occasions by:
 determining, based on the first random access configuration, a first subset of the plurality of random access occasions by excluding any random access occasion in the first set of random access occasions that is not fully within the transmission period of the plurality of FBE frames; and 
 determining, based on the second random access configuration, a second subset of the plurality of random access occasions by including all of the second set of random access occasions. 
 
 
     
     
       21. The wireless communication device of  claim 20 , wherein the second random access configuration indicates at least one of a set of subframes for the second set of random access occasions, a random access slot within a random access subframe for the second set of random access occasions, a starting symbol for the second set of random access occasions, or a number of random access occasions in the random access slot,
 wherein the set of subframes include the idle period of a first FBE frame of the plurality of FBE frames, 
 wherein the second random access configuration indicates the random access slot within the random access subframe, and wherein the random access slot is a last slot within the random access subframe, and 
 wherein the second random access configuration indicates the starting symbol, and wherein the starting symbol is one of:
 within a first FBE frame of the plurality of FBE frames and outside of the idle period of the first FBE frame; 
 within the idle period of a first FBE frame of the plurality of FBE frames; or 
 within the idle period of a first FBE frame of the plurality of FBE frames and offset from an earliest symbol of the idle period of the first FBE frame. 
 
 
     
     
       22. The wireless communication device of  claim 20 , wherein the second random access configuration indicates at least one of a set of subframes for the second set of random access occasions, a random access slot within a random access subframe for the second set of random access occasions, a starting symbol for the second set of random access occasions, or a number of random access occasions in the random access slot,
 wherein the set of subframes include the idle period of a first FBE frame of the plurality of FBE frames, 
 wherein the second random access configuration indicates the random access slot within the random access subframe, and wherein the random access slot is a last slot within the random access subframe, 
 wherein the second random access configuration further indicates the number of random access occasions, and 
 wherein a latest random access occasion of the second set of random access occasions is fully within the idle period of a first FBE frame of the plurality of FBE frames and offset from a last symbol of the idle period of the first FBE frame. 
 
     
     
       23. The wireless communication device of any of  claim 19 or 20 , wherein the processor is further configured to:
 perform a synchronization signal block (SSB)-to-random access occasion mapping procedure, wherein the SSB-to-random access occasion mapping procedure comprises:
 mapping a set of synchronization signal blocks (SSBs) to the first subset of the plurality of random access occasions based on a mapping order; 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the mapping order; 
 mapping the set of SSBs to the first subset of the plurality of random access occasions based on a common association period; and 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the common association period. 
 
 
     
     
       24. The wireless communication device of any of  claim 19 or 20 , wherein the processor is further configured to:
 perform a synchronization signal block (SSB)-to-random access occasion mapping procedure, wherein the SSB-to-random access occasion mapping procedure comprises:
 mapping a set of synchronization signal blocks (SSBs) to the first subset of the plurality of random access occasions based on a mapping order; 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the mapping order; determining a first association period based on at least one of a number of random access occasions of the first subset of the plurality of random access occasions in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 mapping the set of SSBs to the first subset of the plurality of random access occasions based on the first association period; 
 determining a second association period based on at least one of a number of random access occasions of the second subset of the plurality of random access occasions in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the second association period. 
 
 
     
     
       25. A wireless communication device, comprising:
 means for communicating, with a second wireless communication device, a random access configuration for a plurality of frame based equipment (FBE) frames, each FBE frame of the plurality of FBE frames including a transmission period and an idle period; and 
 means for determining a plurality of random access occasions based on the random access configuration, wherein at least one random access occasion of the plurality of random access occasions is at least partially overlapping with the idle period of at least one of the plurality of FBE frames. 
 
     
     
       26. The wireless communication device of  claim 25 , wherein the means for determining comprises:
 means for determining a first group of random access occasions from the plurality of random access occasions, wherein each random access occasion in the first group is within the transmission period of one of the plurality of FBE frames; and 
 means for determining a second group of random access occasions from the plurality of random access occasions, wherein each random access occasion in the second group is at least partially overlapping with the idle period of at least one of the plurality of FBE frames; and 
 wherein the wireless communication device further comprises: 
 means for performing a synchronization signal block (SSB)-to-random access occasion mapping procedure, wherein the SSB-to-random access occasion mapping procedure comprises:
 mapping a set of synchronization signal blocks (SSBs) to the random access occasions in the first group based on a mapping order; and 
 mapping the set of SSBs to the random access occasions in the second group based on the mapping order. 
 
 
     
     
       27. The wireless communication device of  claim 26 , further comprising:
 means for mapping the set of SSBs to the random access occasions in the first group based on a common association period; 
 means for mapping the set of SSBs to the random access occasions in the second group based on the common association period; and 
 means for determining the common association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods. 
 
     
     
       28. The wireless communication device of  claim 26 , further comprising:
 means for mapping the set of SSBs to the random access occasions in the first group based on a common association period; 
 means for mapping the set of SSBs to the random access occasions in the second group based on the common association period; 
 means for determining a first association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 means for determining a second association period based on at least one of a number of random access occasions of the second group in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 means for determining the common association period based on a maximum period between the first association period and the second association period. 
 
     
     
       29. The wireless communication device of  claim 26 , further comprising:
 means for determining a first association period based on at least one of a number of random access occasions of the first group in a random access configuration period, a number of SSBs in the set of SSBs, or a set of allowable association periods; 
 means for mapping the set of SSBs to the random access occasions in the first group based on the first association period; 
 means for determining a second association period based on at least one of a number of random access occasions of the second group in the random access configuration period, the number of SSBs in the set of SSBs, or the set of allowable association periods; and 
 means for mapping the set of SSBs to the random access occasions in the second group based on the second association period. 
 
     
     
       30. The wireless communication device of  claim 25 , wherein:
 the means for communicating the random access configuration comprises:
 means for communicating, with the second wireless communication device, a first random access configuration indicating a first set of random access occasions in the plurality of FBE frames; and 
 means for communicating, with the second wireless communication device, a second random access configuration indicating a second set of random access occasions in the plurality of FBE frames; and 
 
 the means for determining comprises:
 means for determining, based on the first random access configuration, a first subset of the plurality of random access occasions by excluding any random access occasion in the first set of random access occasions that is not fully within the transmission period of the plurality of FBE frames; and 
 means for determining, based on the second random access configuration, a second subset of the plurality of random access occasions by excluding any random access occasion in the second set of random access occasions that is fully within the transmission period of the plurality of FBE frames. 
 
 
     
     
       31. The wireless communication device of  claim 25 , wherein:
 the means for communicating the random access configuration comprises:
 means for communicating, with the second wireless communication device, a first random access configuration indicating a first set of random access occasions in the plurality of FBE frames; and 
 means for communicating, with the second wireless communication device, a second random access configuration indicating a second set of random access occasions in the plurality of FBE frames, wherein each random access occasion of the second set of random access occasions is at least partially overlapping with the idle period of the plurality of FBE frames; and 
 
 the means for determining the plurality of random access occasions comprises:
 means for determining, based on the first random access configuration, a first subset of the plurality of random access occasions by excluding any random access occasion in the first set of random access occasions that is not fully within the transmission period of the plurality of FBE frames; and 
 means for determining, based on the second random access configuration, a second subset of the plurality of random access occasions by including all of the second set of random access occasions. 
 
 
     
     
       32. The wireless communication device of  claim 31 , wherein the second random access configuration indicates at least one of a set of subframes for the second set of random access occasions, a random access slot within a random access subframe for the second set of random access occasions, a starting symbol for the second set of random access occasions, or a number of random access occasions in the random access slot,
 wherein the set of subframes include the idle period of a first FBE frame of the plurality of FBE frames, 
 wherein the second random access configuration indicates the random access slot within the random access subframe, and wherein the random access slot is a last slot within the random access subframe, and 
 wherein the second random access configuration indicates the starting symbol, and wherein the starting symbol is one of:
 within a first FBE frame of the plurality of FBE frames and outside of the idle period of the first FBE frame; 
 within the idle period of a first FBE frame of the plurality of FBE frames; or 
 within the idle period of a first FBE frame of the plurality of FBE frames and offset from an earliest symbol of the idle period of the first FBE frame. 
 
 
     
     
       33. The wireless communication device of  claim 31 , wherein the second random access configuration indicates at least one of a set of subframes for the second set of random access occasions, a random access slot within a random access subframe for the second set of random access occasions, a starting symbol for the second set of random access occasions, or a number of random access occasions in the random access slot,
 wherein the set of subframes include the idle period of a first FBE frame of the plurality of FBE frames, 
 wherein the second random access configuration indicates the random access slot within the random access subframe, and wherein the random access slot is a last slot within the random access subframe, 
 wherein the second random access configuration further indicates the number of random access occasions, and 
 wherein a latest random access occasion of the second set of random access occasions is fully within the idle period of a first FBE frame of the plurality of FBE frames and offset from a last symbol of the idle period of the first FBE frame. 
 
     
     
       34. The wireless communication device of any of  claim 30 or 31 , further comprising:
 means for performing a synchronization signal block (SSB)-to-random access occasion mapping procedure, wherein the SSB-to-random access occasion mapping procedure comprises:
 mapping a set of synchronization signal blocks (SSBs) to the first subset of the plurality of random access occasions based on a mapping order; 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the mapping order; 
 mapping the set of SSBs to the first subset of the plurality of random access occasions based on a common association period; and 
 mapping the set of SSBs to the second subset of the plurality of random access occasions based on the common association period. 
 
 
     
     
       35. A non-transitory computer-readable medium having program code recorded thereon for wireless communication by a wireless communication device, the program code comprising:
 code for causing the wireless communication device to communicate, with a second wireless communication device, a random access configuration for a plurality of frame based equipment (FBE) frames, each FBE frame of the plurality of FBE frames including a transmission period and an idle period; and 
 code for causing the wireless communication device to determine a plurality of random access occasions based on the random access configuration, wherein at least one random access occasion of the plurality of random access occasions is at least partially overlapping with the idle period of at least one of the plurality of FBE frames.